Overview - ISO 22752:2021 (Bodyside windows for rolling stock)
ISO 22752:2021 specifies classification, technical requirements, testing and marking for bodyside windows used on railway vehicles. The standard covers glazing materials and their associated mounting arrangements for:
- Standard windows (fixed and movable)
- Emergency windows (emergency escape and emergency access-which can be the same window in some cases)
Scope: it applies to windows mounted at the sides of all types of railway vehicles (heavy and urban rail) - saloons, restaurant/buffet cars, vestibules, toilets, driving cabs, crew and technical rooms - but does not apply to on-track machines. The standard addresses glazing-only construction and prescribes tests for glazing units and window units (glazing + mounting).
Key technical topics and requirements
ISO 22752 defines safety, quality and functional requirements and associated test methods, including:
- Safety
- Static strength (resistance to leaning and impacts)
- Aerodynamic fatigue loading (for higher design speeds; optional or not required at lower speeds)
- External impact performance (small particles from track, small missiles)
- Shock resistance and fragmentation requirements for tempered glass
- Internal soft-body impact resistance and passenger containment testing
- Emergency function requirements for escape/access windows
- Quality / Durability
- Appearance defects and visual inspection criteria
- Durability (weather-resistance): UV, high temperature, humidity, fire and simulated weathering
- Edge-seal durability and adhesive bonding performance
- Function
- Water tightness
- Durability tests for movable windows
- Optical distortion limits and dew point requirements for insulating glazing
- Marking and documentation requirements for traceability
The standard includes normative test methods and annexes for aerodynamic fatigue values, external impact procedures, passenger containment, edge-seal climate tests and other test procedures.
Practical applications - who uses ISO 22752
ISO 22752 is intended for:
- Train and rolling stock designers and manufacturers specifying bodyside windows
- Glazing and window component suppliers (tempered, laminated, poly-organic glazing like polycarbonate)
- Railway operators and procurement teams evaluating supplier compliance
- Test laboratories and certifiers performing conformity and safety testing
- Maintenance and asset managers assessing replacement windows and refurbishments
Practical uses include design validation, safety/evacuation planning, procurement specifications, regulatory compliance, and lifecycle/durability assessment.
Related standards
ISO 22752 references other standards for test methods, e.g.:
- ISO 3917:2016 - safety glazing materials; resistance to radiation, temperature, humidity and simulated weathering
- ISO 7892:1988 - impact resistance test procedures
Keywords: ISO 22752, bodyside windows, railway windows, rolling stock glazing, laminated glass, tempered glass, emergency escape windows, aerodynamic fatigue, window mounting, water tightness, optical distortion.